DOCSIS Engineering Professional Competencies Engineering Profe2016-08-17SCTE DOCSIS Engineering Professional Competencies ... Microsoft Word - DOCSIS Engineering Professional Competencies FINAL.docx

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SCTE DOCSIS Engineering Professional Competencies Page 1 of 8 SCTE DOCSIS Engineering Professional Certification Scope The SCTE DOCSIS Engineering Professional Certification (DEP) helps broadband professionals better understand the elements and implementations of DOCSIS 1.0 through DOCSIS 3.0 specifications. Specific topics include: Architecture o HFC Fundamentals o DOCSIS Network Entities DOCSIS Layering o CM and CMTS Protocol Layering o DOCSIS Physical Layer o DOCSIS MAC Layer DOCSIS Network Operations o DOCSIS Specification Differences o DOCSIS QoS Mechanisms o Data Forwarding o CM/CMTS Interaction o Performance Aspects o DOCSIS Security Concerns o Troubleshooting DOCSIS Technology Enablement o Installation o Security o DOCSIS Set-Top Gateway SCTE DOCSIS Engineering Professional Competencies Page 2 of 8 I. Architecture Competency Knowledge, Skills, and Abilities A. HFC Fundamentals 1. HFC Network Elements a. Optical fiber b. Coaxial cable c. Amplifiers d. Passive coaxial components e. Optical network passives f. Optical transmitters g. Optical amplifiers h. Optical receivers 2. HFC Fundamental Concepts a. Analog and digital signals b. Digital modulation c. Signal to noise ratio (SNR) d. Carrier to noise ratio (C/N) e. Downstream and upstream RF f. Channelization g. Topology h. Linear distortions i. Micro-reflections ii. Amplitude tilt iii. Group delay i. Non-Linear Distortions i. Common path distortion (CPD) ii. Continuous wave (CW) interference iii. Composite second order (CSO) iv. Composite triple beat (CTB) SCTE DOCSIS Engineering Professional Competencies Page 3 of 8 B. DOCSIS Network Entities 1. Evolution of DOCSIS 2. Standardization 3. CableLabs certification and qualification process 4. Reference architecture 5. Cable modem (CM) 6. Cable modem termination system (CMTS) 7. Back office servers a. Dynamic host configuration protocol (DHCP) b. Time of day (ToD) c. Trivial file transfer protocol (TFTP) II. DOCSIS Layering Competency Knowledge, Skills, and Abilities A. CM and CMTS Layering 1. Protocol layer comparisons a. OSI and TCP/IP protocol stacks b. DOCSIS Technology CMTS stack c. DOCSIS Technology CM stack B. DOCSIS Physical Layer 1. DOCSIS physical layer 2. Upstream physical layer a. Modulation b. Coding c. Preamble prepend d. Spectral shaping e. Transmit pre-equalization f. Transmit power g. Burst profiles h. Fidelity requirements i. Time division multiple access (TDMA) i. Mini slot size j. Advanced time division multiple access (ATDMA) k. Synchronous code division multiple access (S-CDMA) l. Orthogonal frequency division multiplexing SCTE DOCSIS Engineering Professional Competencies Page 4 of 8 (OFDM) m. TDMA versus A-TDMA n. TDMA versus S-CDMA o. S-CDMA spreading p. S-CDMA framing 3. Downstream physical layer a. Downstream modulation b. Downstream coding c. Interleaving d. CMTS clock generation 4. RF Characteristics a. Carrier to noise ratio (C/N) b. Bit error ratio (BER) c. Modulation error ratio (MER) d. Error vector magnitude (EVM) e. Constellation analysis 5. Downstream MPEG transmission convergence (TC) a. MPEG transport stream (MPEG-TS) b. MPEG header for DOCSIS Technology c. MPEG payload for DOCSIS Technology 6. Corrective techniques a. Forward error correction (FEC) b. Bit/byte interleaving c. Channel change d. Frequency hop e. Long-loop automatic gain control (AGC)/ automatic level control (ALC) SCTE DOCSIS Engineering Professional Competencies Page 5 of 8 C. DOCSIS MAC Layer 1. DOCSIS MAC layer frame formats 2. MAC management messages a. MAC domain descriptor (MDD) 3. Upstream bandwidth allocation 4. Timing and synchronization 5. Upstream contention resolution 6. Encryption support 7. Downstream channel bonding 8. Upstream channel bonding 9. Bonding groups 10. Load balancing 11. Traffic engineering 12. Logical channels D. Service Groups 1. MAC domains 2. Upstream service group (SG) 3. Downstream service group (SG) 4. Service group (SG) sizing SCTE DOCSIS Engineering Professional Competencies Page 6 of 8 III. DOCSIS Network Operations Competency Knowledge, Skills, and Abilities A. Differences between DOCSIS 1.0, 1.1, 2.0, and 3.0 Specifications 1. DOCSIS 1.0 Specification (define/describe/contrast) 2. DOCSIS 1.1 Specification (define/describe/contrast 3. DOCSIS 2.0 Specification (define/describe/contrast) 4. DOCSIS 3.0 Specification (define/describe/contrast) B. DOCSIS Quality of Service (QoS) Mechanisms 1. Packet classification 2. Service flows 3. QoS parameters 4. Upstream service flow scheduling services 5. Pre-DOCSIS 3.0 technology concatenation and fragmentation 6. DOCSIS 3.0 technology continuous concatenation and fragmentation 7. Payload header suppression (PHS) 8. QoS definitions C. Data Forwarding 1. CMTS OSI layer 2 forwarding 2. CMTS OSI layer 3 forwarding 3. Multicast forwarding D. CMTS /CM Interaction (CM registration, service flows, bandwidth allocation) 1. Cable modem initialization and registration process a. Scanning and synchronizing to downstream b. Upstream channel parameters c. Timing adjustment d. Service identifier (SID) e. Initial ranging f. IPv4 connectivity g. IPv6 connectivity h. Network time stamp i. DOCSIS configuration file download j. Registration k. Privacy initialization l. CPE provisioning 2. Dynamic service 3. Dynamic bonding change SCTE DOCSIS Engineering Professional Competencies Page 7 of 8 E. Performance Aspects 1. Request / grant mechanisms 2. Transmission control protocol (TCP) windowing 3. Channel bonding 4. Bandwidth efficiency vs. robustness tradeoff 5. DOCSIS technology latency issues 6. System throughput versus per user data rates F. DOCSIS Security Concerns 1. DOCSIS CM secure software download (SSD) 2. Public key infrastructure (PKI) 3. Baseline privacy interface (BPI) 4. Baseline privacy interface plus (BPI+) 5. Digital Certificates G. Troubleshooting 1. Common network issues 2. Constellation analysis 3. DOCSIS channel bonding 4. RF impairments 5. RF impairment on DOCSIS Technology modem state 6. Impulse coefficient and pre-equalization analysis SCTE DOCSIS Engineering Professional Competencies Page 8 of 8 IV. DOCSIS Technology Enablement Competency Knowledge, Skills, and Abilities A. Installation 1. Access network design 2. Downstream considerations 3. Upstream considerations 4. Cabling the system 5. Ensuring installation success 6. Channel placement B. Security 1. DOCSIS 3.0 security and provisioning 2. DOCSIS 1.1 security and provisioning 3. DOCSIS BPI and provisioning 4. Secure software download (SSD) C. DOCSIS Set-top Gateway 1. Out of Band (OOB) communications path 2. DOCSIS Set-top Gateway (DSG) infrastructure 3. DSG Tunnels 4. Tunnel types 5. DSG traffic

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